- any of various high-carbon steels capable of being hardened and tempered to meet special requirements for machining, etc.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tool steel
The highest grades of tool-steel are improved by being kept in stock for a considerable time, the longer the better.Inventors at Work
Presently his friend Derec came to see him in the tool-steel cell in which he had been placed.The Pirates of Ersatz
They could grind up and swallow anything but tool-steel reinforced with diamond chips.Attention Saint Patrick
William Fitzgerald Jenkins
- any of various steels whose hardness and ability to retain a cutting edge make them suitable for use in tools for cutting wood and metal